Patient sex, Mini‐Mental State Examination score, performance status, Charlson Comorbidity Index value, weight loss, frailty, recognition, Barthel Index, MMSE, anemia, hypoalbuminemia, creatinine, lactate dehydrogenase (LDH), C‐reactive protein (CRP), and platinum doublet combination therapy or single‐agent chemotherapy were evaluated as potential risk factors in the Cox proportional hazards model. This evidence concerns the gene CRP and anemia.